The SMT line consists of multiple production units, including feeder, placement machine, reflow furnace, etc. 

First, the feeder loads various components (such as resistors, capacitors, integrated circuits, etc.) onto the feeder. Then, the printed circuit board enters the placement machine through the conveyor belt. Under the control of the mechanical arm, the components are grabbed from the feeder and accurately mounted on the circuit board. After the mounting is completed, the circuit board continues to enter the reflow oven through the conveyor belt. In the reflow furnace, the circuit board passes through the heating area, the solder melts and the circuit board is welded, and finally a complete electronic component assembly is formed.
The working principle of the SMT line is based on a precise mechanical and electronic control system, which can efficiently complete the mounting of components. Compared with the traditional manual mounting, SMT line has the advantages of high production efficiency, high precision and stable quality, which greatly improves the production speed and quality of electronic products. In the modern electronic manufacturing industry, SMT line has become an indispensable production tool, providing strong support for the manufacture of electronic products.
In a word, SMT line promotes the development of electronic manufacturing industry and brings more competitive advantages for production enterprises with its efficient and accurate placement principle.